Moisture trap for dry pipes



Patented Oct. 3, 1939 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to a moisture trap for the dry pipes of evaporators. The invention is more particularly designed for use in evaporators and vacuum pans in sugar factories.

In the usual evaporator, moisture will occasionally carry over into the dry pipe, especially when the evaporator is filled or heated beyond its normal capacity.

The principal object of this invention is to provide a simple, inexpensive and eflicient device which can be easily installed in the usual evaporator vacuum pan and which will collect and return all fluids to the evaporator so as to allow only dry vapor to escape.

Other objects and advantages reside in the detail construction of the invention, which is designed for simplicity, economy, and efficiency. These will become more apparent from the following description.

In the following detailed description of the invention reference is had to the accompanying drawing which forms a part hereof, Like numerals refer to like parts in all views of the drawing and throughout the description,

In the drawing:

Fig. 1 is an end view of a typical sugar syrup evaporator partially broken away to illustrate the invention therein.

Fig. 2 is a cross-section through the dry pipe, taken on the line 2-2, Fig. 3, illustrating the invention applied thereto.

Fig. 3 is a longitudinal fragmentary section of the dry pipe.

A typical evaporator is indicated at ill with its steam tubes at H, vapor dome at l2, and dry pipe at [3. The dry pipe extends longitudinally through the vapor dome from one end wall thereof through the other end wall and is slotted along its top to provide an open vapor slot M.

The vapors from the evaporation flow through this slot into the pipe I3 and are drawn from the open extremity thereof. The other extremity is closed by the end wall of the evaporator.

Occasionally, syrup will splash or be carried into the slot l4 and be drawn from the dry pipe interfering with later refining operations and requiring subsequent collection. This is prevented in the present invention by forming a 50 relatively wide transverse slot l5 across the bottom of the dry pipe l3 adjacent its exit extremity.

A flat hopper-like collecting box I6, the forward wall of which is continued upwardly into the dry pipe 13 to form a baille plate I! extending across the bottom of the pipe I3 and closes the slot [5. A drain tube I8 extends downwardly from the collecting box I6 to an outlet'bell l9 immediately above the bottom of the evaporator.

It can be readily seen that the Weight of any moisture in the vapors in the dry pipe l3 will cause it to travel along the lower portion of the pipe. This moisture will be carried along by the flow of the vapor until it reaches and enters the collecting box IS, The lighter moisture particles will strike the baffle plate I! and thence flow downwardly into the box. The collected fluids will be returned to the evaporator through the drain pipe 15.

The bell IS on the bottom of the drain pipe I8 has been found useful for preventing the fluids from boiling or bubbling back up the drain tube.

While a specific form of the improvement has been described and illustrated herein, it is desired tobe understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the in- Vention.

Having thus described the invention, What is claimed and desired secured by Letters Patent 1. A moisture trap for pipes comprising: a laterally extending slot across the bottom and lower side walls of said dry pipe; a laterally extending, flattened, hopper-shaped collecting box formed to fit to said pipe about said slot; a baflle lip formed by projecting the forward face of said box upwardly through said slot into said dry pipe; and means for draining collected fluid from said box.

2. A moisture collector comprising: a horizontal pipe having a relatively narrow open slot extending laterally across its bottom and partially up its sides; a relatively narrow, hopperlike box sealed to said pipe below said slot; and a far wall in said box extending vertically upward through said slot into said pipe to form a baille from wall to wall across the bottom thereof,

ROY L. LAY.

Oct. 3, 193. L. A. LAYNE SCREEN PROTECTOR Filed Feb. 1, 1936 7. -5 o IAIIIIIIIIIII/ I v 22?.

QINVEVTOR. LESLI E A. LAYNE 1?. M12. 1 mm (3. 012m.

A TTORNEYS. 

